docs: def view_required_params_per_trt(token, dstore):
      """
      Display the parameters needed by each tectonic region type
      """
      csm_info = dstore['csm_info']
      tbl = []
      for grp_id, trt in sorted(csm_info.grp_by("trt").items()):
          gsims = csm_info.gsim_lt.get_gsims(trt)
          maker = ContextMaker(trt, gsims)
          distances = sorted(maker.REQUIRES_DISTANCES)
          siteparams = sorted(maker.REQUIRES_SITES_PARAMETERS)
          ruptparams = sorted(maker.REQUIRES_RUPTURE_PARAMETERS)
          tbl.append((grp_id, ' '.join(map(repr, map(repr, gsims))),
                      distances, siteparams, ruptparams))
      return rst_table(
          tbl, header='grp_id gsims distances siteparams ruptparams'.split(),
          fmt=scientificformat)